5G NR

Figure 4.19 Illustration of the regular and wideband reference signals for PDCCH [68].

The block of bits $b(0),b(1),\mathrm{\dots },b(N_{PDCCH}-1)$, where $N_{PDCCH}$ denotes the number of bits transmitted on PDCCH, is scrambled prior to modulation, resulting in a block of scrambled bits $\tilde{b}(0),\tilde{b}(1),\mathrm{\dots },\tilde{b}(N_{PDCCH}-1)$ where $\tilde{b}(i)=\left[b(i)+c(i)\right]\mathrm{mod}2$, in which $c(i)$ is a length-31 ...